Band-saw mill



(Nd Moae1.). Y Y j @sheetssneet- 1. e. H. ROBERTS. BAND SAW MILL.

No. 567.282. Patented Sept. 8, 1896.

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' C. H..ROBERTS.

BAND SAW MILL.

No. 567,282. Patented Sept. 8, 1896.

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0. H. ROBERTS. ABAND SAW MILL.

No. 567,282. Patentedept. 8,1896.

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UNITED STATESi 4Imran Ome@ orIARLEsH. ROBERTS, OE EvANsvIIQLE, INDIANA, AssIGNoR To THE MURRAY IRON wORKs COMPANY, or BURLINGTON, IOWA.

BAND-,SAW MILL.

sPEcIFIcATIoN forming pere of Lettereretent Neg-567,282, 'tiered september` s, 1896. Apnieaae ned Jennery 23,1395. serai No. 535,946. (No man.)

State of Indiana, have inventeda new and useful Band-S'aW-Mill, of vwhich the follow^ ing is a specification.

This invention relates toband-saw mills; and it has for its object to effect certain improvements in. mills of this character, whereby the parts thereof may be more readily and accurately adjusted to suit the requirements of the Work and the different sizes of saws employed, while at the same time contemplating novel and efficient means for maintaining the band-saw at the proper tension or suitably strained. p

With these and other objects in view, which will readily appear as the nature of the invention is better understood, the same consists in the novel construct-ion, combination,

and arrangement of parts hereinafter more fully described, illustrated, and claimed.

ln the drawings, Figure 1 is a side elevation of a band-sawmill constructed in accordance with this invention.. Fig. 2 is a vertical sectional view thereof at one side of the up- Fig. 3 is a vertical sectional view on the line 3 3 of Fig. 2. FigAc is a horizontal sectional view on thev line 4 4 of Fig. 3. Fig. 5is a detail elevation of that portion of the mill forming the lumber-table for sawed lumber.

Fig. 7 is an enlarged detail sectional View on the line 7 7 of Fig. 3.

Referring to the accompanying drawings, 1 designates the main supporting-frame of the mill that is suitably secured on the base or foundation la. 4 The main supportingframe 1 of the mill essentially consists of op- ;.posite vertical tubular uprights 2, and a transt.verse casin g portionv 3, formed integrally with 45 the opposite tubular uprights and connecting the same at an intermediate point to form a casing or housing for some of the gearing of the mill. The frame 1 is preferably sectional and is formed in duplicate upper and lower sections provided with upper and lower meeting anges 4, suitably connected together Fig. 6 is a detaih side elevation of the adjusting device for' one of the journal-boxes of the upper wheel' shaft.

, when the various parts of the mill are assem- "bled, and this sectional construction of the main supporting-frame of the mill provides a construction of frame that may be conveniently handled in shipping and setting up the mill.

The opposite vertical tubular uprights 2 of the frame 1 receive within the upper ends of the same the vertically-adjustable bearing- -posts 5, that are provided with upper reduced extremities 6, arranged between depending parallel lianges 7, projected integrally from the lower sides of the journal-boxes 8, that -are mounted on the upper ends of the said bearing-posts 5, and said journal-boxes 8 receive therein the ends of the upper horizontal wheel-shaft 9, On which is mounted, adjacent to one of the journal-boxes 8, the upper band-saw wheel 10, over which passes the u pper portion of an endless band-saw l1 of the usual construction. The depending lianges 7 of the journal-boxes S and the upper reduced extremities 6 of the posts 5 receive transverse adj usting-bolts 12, that form an adjustable connection between the boxes 8` and the upper ends of the posts 5, and the bolt 12 for the journal-box at the rear end of the shaft 9 or at the end'opposite the Wheel 10 forms a sliding connection between such journal-box and the upper end of the bearing-post on which it is mounted, so that the said journal-box may be adjusted laterally or transversely by means of the adjustinglever 13. The adj usting-lever 13 is pivotally Vmounted near its upper end, as at lll,y at one side of one of the bearing-posts 5, and above its point of pivot the said lever is provided with a fork l5, that loosely engages over a rounded lug 16, cast on the under side and at one end of the journal-box 8 for the rear end of the wheel-shaft 9. The lever 13is made of thin spring met-al and normally presses inward toward one side of one ofthe uprights 2, and extending upward vfromthe lower end and on the' inner sideof the lever 13 is a catch-rib or longitudinally-extended bearing-surface 17, adapted to slidably en# gage in the teeth of a notched segment or equivalent fixed catch 18, itted on oneof the uprights 2. The movement of the lever 13 in either direction provides for the transverse IOO movement or adjustment of the journal-box 8, connected therewith, in an opposite direction, thereby changing the line of the upper wheel-shaft 9, in order to provide means for securing the proper adjustment for leading the band-saw 11 from the wheels carrying the same in a proper line for sawing, as will be readily understood by those skilled in the art.

The vertically-adjustable bearing-posts 5, that work in the upper ends of the tubular uprights 2, have connected. with the lower ends thereof the rack-bars 19, that work inside of the said uprights 2. The rack-bars 19, supporting the vertically-movable posts 5, mesh with the pinions 20, that are mounted, respectively, on separate longitudinallyalined adj usting-shafts 21 and 22. As illustrated in the drawings, the shafts 21 and 22 are arranged inside of the transverse casing portion 3 of the main supporting-frame, and said shafts are of different lengths, in order that the various parts of the mill may be properly positioned. Each of the shafts 21 and 22 has mounted on the inner adjacent ends thereof a cog-pinion 23, which meshes, respectively, with the parallel Vertical rackplates 24 and 25. The rack-plates 24 and 25 are arranged on a vertically-adjustable rackframe' 26, that is substantially rectangular in shape and is provided with a vertical longitudinal slot between the two rack-plates 24 and 25. The rack-plate 24 is preferably formed integral Vwith the rack-frame 26 and meshes with the cog-pinion 23 on the inner end of the adjusting-shaft 21, and the other rack-plate, 25, is a separate plate and is mounted to slide on the frame 26 for longitudinal adjustment. Directly beyond the upper and lower ends of the vertically-adjustable rack-plate 25 the frame 26, carrying such rack-plate, is provided with the perforated flanges or ears 27, that receive an adjusting-screw. 28. The adjusting-screw 23 engages in a vertical longitudinal opening 29, formed in the rack-plate 25 to provide -for the vertical adjustment thereof, and the lower extremity of the said adjusting-screw 23 is adapted to be engaged by the nut 30, working below the lower of said flanges or ears 27, to secure the rack-plate 25 in its adjusted position, and at its upper end the lscrew 2S is provided with a suitable head 31,

' which provides for turning the screw to adjust the movable rack-plate 25.

The inner extremities of the adjustingshafts 21 and 22 at one side of the cog-pinions 23 loosely receive the opposite ends of a lever-fork 31, fitted on the inner end of the tension-lever 32, which extends at one side of the main supporting-frame 1 and carries upon its outer end the tension-weight 33, which is sufficiently heavy for maintaining the band-saw 11 -at the proper stretch or tension. The fork 31, at the inner end of the tensionlever=32, is provided in its opposite sides adjacent to the inner extremities of the "shafts 21 and 22 with the pivot-openings 34,

that loosely engage the fulcrum-studs 35, projected from opposite sides of an adjusting-nut 36, arranged between the separate parallel racks 24 and 25, carried by the rackframe 26. The adjusting-nut 36 is interiorly threaded and accommodates therein the vertical adjusting-screw 37, tted in the upper end of the frame 26 and carrying at its upper end above the top of said frame the hand-wheel 33, by means of which the frame 26 may be raised and lowered.

By turning the screw 37 the frame 26 can be raised or lowered, and will thereby oommunicate, through the medium of the rackplates 24 and 25 and the pinions 23, the necessary motion to the shafts 21 and 22 to raise or lower the bearing-posts 5, as may be required in removing or replacing the saw, and when the mill is in operation the weighted tension-lever 32 will normally tend to force the nut 36 downward, and will therefore normally press the rack-frame 26 downward, so as to yieldingly maintain the band-saw at the proper stretch or tension. In addition to these4 adjustments it will be obvious that by adjusting the vertically-movable rack-plate 25 independently of the fixed rack-plate 24 a separate adjustment can be given to the bearingsupport for the rear end of the upper wheelshaft 9, and this adjustment is for the purpose of raising or lowering the rear end of the upper wheel-shaft, so as to compel the saw to run on the wheels carrying the same in its proper place for sawing, and also for accommodating the mill to different lengths of saws, as will be understood.

The lower ends of the tubular uprights 2, below the transverse casing portion 3, have fitted therein the depending bearing-posts 39. The depending bearing-posts 39 are provided with reduced. lower ends 40, in which are litted transversely-arranged supportingpins 41, the extremities of which are fitted in side hanger-plates 42, arranged parallel at opposite sides of the reduced lower ends 40 of the posts and secured to opposite sides of the posts directly below the lower extremities of the upright-s 2. The supportingpins 41 loosely receive thereon the parallel perforated flanges 43, projected integrally from the upper sides of the journal-boxes 44, in which are journaled the ends of the lower wheelshaft 45. Below the supporting-pins 41,011 which they are loosely hung, the said journalboxes 44 receive the adj Listing-screws 46,that work against opposite sides of the reduced lower ends 40 of the posts 39, and provide means for the lateral or transverse adjustment of the journal-boxes 44, in order to secure the proper. plumb adjustment of the lower wheel-shaft 45. The adjustlnent for the journal-boxes of the lower wheel-shaft 45 prevents the strain resulting from the driving-belt pulling sidewise from having a tendency to throw the lower wheel-shaft out of plumb.

The lower wheel-shaft 45 has mounted IOO IIO

thereon, adjacent to one of the j ournal-boxes 44, the lower band-saw wheel 46, that is arranged directly below the upper band-saw wheel 10, and :receives thereover the lower portion of the band-saw 11. The lower wheelshaft 45 has mounted thereon at an intermediate point the band-wheel 47, over which passes the usual driving-belt, and at one side of the band-wheel 47 the shaft 45 has mounted thereon the pulley 48, over which passes the belt 49, that also passes over a pulley 50, mounted on the short counter-shaft l. The counter-shaft 5l is mounted in suitable bearings 52, arranged within the transverse casing portion 3, and carries the usual reverselydisposed beveled friction-wheels 53, that are adapted to operate against a cone frictionpulley 54, on the lower end of an adjustingshaft 55, provided with a screw portion 56, working through an adj usting-block 57 at the inner end of the curved oifstanding guidearm 58, that carries the usual upper guide 59 for the saw. The ordinary adjusting device 60 is connected with the shaft 5l, to provide for adjusting the wheel 53 against the pulley 54.

In the present invention the counter-shaft 5l also has mounted thereon at one side of the pulley 50 a cog-pinion 6l, that meshes wi th an adjacent cog-wheel 62,mounted on one hollow delivery-roll 68.

side of the mill-frame and has fitted on such4 fend of a short second counter-shaft 63. Vsecond counter-shaft 63 is hung in suitable bearings 64, arranged on the frame of the mill,

The

and on the end opposite the cog-wheel 62 the shaft 63 carries a beveled gear-pinion 65, meshing with a similar pinion 65a, mounted on the inner end of the roll-shaft 66. roll-shaft 66 is supported at one side of the `main supporting-frame l of the mill, and hasV mounted thereon near its opposite ends circular heads 67, over which heads is fitted a The hollow1 deliveryroll 68 has motion imparted thereto through the'medium of the gearing described, and is located directly opposite a fixed lumber-table 69,5that is secured in position at one side of the main supporting-frame l, directly under the Aguide-supporting arm 58 and at the innerl side of the saw ll. l The fixed lumber-table 69 is provided on its outer side with a pair of offstandin g lugs 70, which provide convenient means for supporting the lower saw-guide in position directly under the upper saw-guide 59.` When the mill is in operation, the sawed lumber isreceived bythe table 69 and the roll 68,y the latter of which assists to run the sawed lumber o at the rear end of the mill.V

Suitably arranged above the lower band-saw wheel 46, within the main supporting-frame ofthe mill, is a short rock-shaft 7l. The rock-shaft 7l is mounted in suitable bearing-hangers 72, arranged within the frame, and one end of said shaft extends out at one outer end one end of an adjusting-lever 73, that provides means for rocking the said j shaft when desired. The said rock-shaft 71 has mounted thereon, between the bear- The ing-hangers therefor, a pair of offstandin g rock-arms 74, which project downwardly at opposite sides of the rim of the wheel 46a, and each of said rock-arms 74 have pivotally attached to their lower rends the brake-shoes 75, that are adapted to work against the inner side of the 'rim of the wheel 462L at both sides of the web of such wheel, so that when the lever 73 is manipulated said brake-shoes can be clamped against the inner side of the rim of the wheel 46a for the purpose of quickly stopping the mill to change saws when required or when an accident occurs. Besides performing this important function the brakeshoes 75 serve to clear the inner side of. the rim of the wheel 46 from accumulations of sawdust, which accumulations very often throw the wheel out of balance.

The rock-arms 74, carried by the shaft 71, are provided at their upper ends with integral offstanding arm extensions 76, theouter ends of which arm extensions lie above the top of the wheel 46a and have fitted therein the ends of a pivot rod 77, on which is mounted a self-adjusting steel scraper-plate 78. The self-adjusting steel scraper-plate is arranged to work between the arm extensions 7 6, and is provided with a lower inclined scraping edge 79, that is normally held in contact with the exterior periphery ofthe wheel 46 by means of the spring 80, coiled on the pivot-rod 77 and connected with the said scraper-plate 78. The scraper-plate 7 8 serves to keep the exterior periphery of the lower band-saw wheel free from accumulations of sawdust and thereby insure an even running of the band-saw.

From the above it is thought that the construction, operation, and advantages of the herein-described improvements in band-saw mills will be apparent without av further description, but at this point attention is called to the fact that the two separate adjustments for the upper wheel-shaft, namely, the transverse adjustment and the tilting adjustment IOO IIO

secured bythe independent adjustment for the rear end of the shaft, provide for the two movements orI adjustments of such shaft, which are absolutely required to insure the band-saw running in its properposition on the band-wheel when in operation, since there is such a difference in the tension of different band-saws which are employed in connection with band-saw mills.

Changes in the form, proportion, and ,the

per ends of. said posts, one'of said boXesbeing supported to have a lateral sliding move` ment, a fixed catch arranged on one of said uprights below the slidably-supported journal-box, a laterally-swinging adjusting-lever pivoted to one of the vertically-adjustable posts and having a loose connection with the slidably-supported'journal-box to provide for the lateral adjustment thereof, said lever also having a longitudinal extended bearing-surface adjustably and slidably'engaging said iixed catch, the upper wheel-shaft carrying the upper band-saw wheel, and the lower Wheelshaft carrying the lower band saw wheel, substantially as set forth.

2. In a band-saw mill, the frame having opposite tubular uprights, vertically-adjustable posts mounted within the upper ends of said uprights, j ournal-boxes adj ustably fitted on the said bearing-posts, one of said journal-boxes being provided with a lug, an adjusting-lever arranged at one side of one of the tubular uprights and pi votally carried by one of the bearing-posts, said lever being provided at its upper extremity with a fork loosely engaging over said lug, a catch device for said adjusting-lever, the upper wheel- Vshaft mounted within said j ournal-boxes and carrying an upper band-saw wheel, and a lower wheel-shaft mounted at the lower ends of the tubular uprights and carrying a'lower band-saw wheel, substantially as set forth.

3. In a band-saw mill, the frame having opposite tubular uprights, adj ustably-supported journal-boxes arranged at the upper ends of said uprights, the upper wheel-shaft mounted in said upper journal-boxes and carrying an upper band-saw wheel, depending bearing-posts iitted in the lower ends of said uprights and provided with lower reduced ends and opposite parallel side hangerplates, transversely-arran ged supporting-pins fitted in the lower reduced ends of bearingposts and in said side hanger-plates, lower journal boxes having parallel perforated iianges receiving said supporting-pins, adjusting-screws fitted in the iianges of said journal-boxes and impinging against opposite sides of the reduced lower ends of the bearing-posts, and the lower wheel-shaft mounted in said lower journal-boxes and carrying a lower band-saw wheel, substantially as set forth.

4. In a band-saw mill, the combina-tion of the frame having opposite tubular uprights, vertically-adjustable bearing-posts mounted in the upper ends of said uprights and carrying at their upper ends journal-boxes and at their lower ends within the uprights rackbars, the upper wheel-shaft mounted in said j ournal-boxes and carrying a band-saw wheel, separate longitudinally alined adjustingshafts mounted within the frame and carrying 4pinions meshing with the rack-bars of said bearing-posts, gear-pinions fitted on the inner adjacent ends of said adj usting-shaft, and a weighted vertically-adjustable racklframe carrying separate vertically-disposed rack-plates meshing respectively with the gear-pinions of the separate ad justin g-shafts,

substantially as set forth.

5. In a band-saw mill, the frame having opposite tubular uprights, vertically-adjustable bearing-posts mounted in the upper ends of said uprights and carrying at their upper ends journal-boxes and at their lower ends within the uprights rack-bars, the upper wheel-shaft mounted in said journal-boxes, separate longitudinally alined adjustingshafts mounted within the frame and carrying pinions meshing with the rack-bars of said bearing-posts, gear-pinions fitted on the inner adjacent ends o`f said adj Listing-shafts, and a weighted vertically-adjustable rackframe carrying separate vertically-disposed rack-plates meshing respectively with the gear-pinions of the separate adj listing-shafts, one of said rack-plates being independently vertically adjustable, substantially as set forth.

6. In a band-saw mill, the frame having opposite tubularl uprights, bearing -posts mounted to slide within the upper ends of said uprights and carrying at their lower ends rack-bars, the upper wheel-shaft supported by said bearing-posts, separate longitudinally-alined adjusting-shafts carrying pinions meshing with said rack-bars, gear-pinions ttcd on the inner adjacent ends of the adj usting-shaf ts, a verticallyadj ustable rackframe carrying separate vertically-disposed rack-plates meshing respectively with the gear-pinions of the adjusting-shafts, one of said rack-plates being vertically movable, an adj usting-screw mounted in said rack-frame and engaging with the movable rack-plate to adjust the same, a weighted lever connected with said rack-frame to normally lower the same, and means for positively raising and lowering the rack-frame, substantially as set forth.

7. In a band-saw mill, the frame having lof opposite tubular uprights, bearing-posts mounted within the upper ends of the uprights and carrying rack-bars at their lower ends, the upper wheel-shaft supported by said bearing-posts, separate longitudinallyalined adjusting shafts carrying pinions meshing with the rack-bars, gear -pinions itted on the inner adjacent ends of the adjusting-shaft, a vertically-adjustable rackframe carrying separate vertically-disposed rack -plates mesh-ing respectively with the gear-pinions of the separate adj Listing-shafts, an interiorly-threaded nut arranged between the rack-plates and provided with oppositelyprojected fulcrurn-studs, a weightedtensionlever provided at its inner end with a fork fulcrumed on the studs of said nut and loosely iitted at its opposite extremities on the inner extremities of said adjusting-shafts, and an adjusting-screw mounted in the upper end of the rack-frame and engaging within said nut, substantially as set forth.

S. In a band-saw mill,the combination with the band saw Wheel; of a lever operated rock-shaft supported adjacent Vto the rim of said Wheel, a pair of rock-arms mounted on said rock shaft and arranged at opposite sides of the rim of the Wheel, and brake-shoes attached to the ends of the rook-arms beyond the shaft and Working against the inner side of the rim of the Wheel, substantially as set forth.

9. In a band-saw mill, the combination with the band-saw Wheel; of a lever-operated rock-shaft supported adjacent to the rim of the Wheel, a pair of rock-arms mounted on said rock-shaft at opposite sides of the rim of the wheel and carrying brake-shoes Working against the inner side of the rim of the Wheel, said rock-arms being .provided adjacent to the shaft With integral extensions,

and a self-adjusting scraper-plate mountedbetween the arm extensions and contacting zo With the exterior periphery of the Wheel, substantially as set forth.

CHARLES H. ROBERTS.

Vitnesses:

J. M. VAN GOTT, NEAL WILKIN. 

